The generaly practice in downstate New York is that the seller enters into an exclusive listing agreement with a broker and then lists and advertises the property. The agreement will set the total compensation for the broker, commonly 6%, but often reduced to 5% or sometimes less, particularly on high-value properties.
If another broker introduces the property to the buyer, the custom is that the listing broker split the brokerage commission with the introducing broker 50/50. If, however, the listing broker produces the buyer him- or herself, the listing broker is entitled to the entire commission. If a buyer responds to an advertisement or an open house sponsored by the listing broker (without the assistance of another broker), the listing broker is considered to have produced the buyer, and is entitled to the entire commission.
Most listing agreements provide that the listing broker is entitled to a commission even if the buyer is procured by the seller or otherwise, though it is uncommon (but not unheard of) for sellers to sometimes write general or specific exceptions into the the agreement.
In New York each brokerage firm has only one individual who is the “broker”, and legally responsible for all transactions. The others who are commonly thought of as “brokers” are licensed as either associate brokers or salespersons, and work under the authority of the broker. The commissions are usually split between the broker (for the brokerage firm) and the salesperson/associate broker under an arrangement separately negotiated between the firm and the individual (sometimes 50/50, sometimes not).
It is relatively easy to get a salesperson’s license if you take the courses, pass the test and are sponsored by a broker. Further, to work as a licensed salesperson, one must always be sponsored by a licensed broker. To become a licensed broker (including associate broker), one must have worked as a salesperson for at least one year, among other requirements (unless you are an attorney). As such, it is virtually impossible in New York to become licensed as a broker for the purposes of a transaction (unless you are already a lawyer). There are also laws about splitting fees with unlicensed individuals, so being the licensed broker for friends who want to do their own legwork would probably not work. If someone is a licensed as a salesperson is purchasing for him- or herself, her or she can relatively easily get his or her broker (or brokerage firm) on the deal as the introducing broker, and then the commission can be split as agreed between the broker (or firm) and the salesperson, but that depends on the willingness of the broker to work out a favorable split and won’t work for purchases made for others. Here’s New York’s FAQ on the subject of licensing.
If you were in New York, it would be likely to be difficult to capture part of the listing broker’s commission unless you are already licensed as a broker or salesman. Your mileage may, of course, vary, and if you have any questions about this general explanation, you should consult your own attorney or real estate professional.
Good luck.